IB/qib: Convert timers to use timer_setup()

In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
helper to pass the timer pointer explicitly.

Cc: Mike Marciniszyn <infinipath@intel.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: linux-rdma@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/qib/qib_tx.c

@@ -552,9 +552,9 @@ void qib_hol_up(struct qib_pportdata *ppd)
 /*
  * This is only called via the timer.
  */
-void qib_hol_event(unsigned long opaque)
+void qib_hol_event(struct timer_list *t)
 {
-	struct qib_pportdata *ppd = (struct qib_pportdata *)opaque;
+	struct qib_pportdata *ppd = from_timer(ppd, t, hol_timer);
 
 	/* If hardware error, etc, skip. */
 	if (!(ppd->dd->flags & QIB_INITTED))